An unexpectedly extraterrestrial room in a former Victorian resort club.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

This replica of the Greek structure is in the heart of Nashville.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The world's longest known cave system.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This restaurant proudly displays bread signed by the 39th president.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

An office built to look like a giant basket.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

A 30-foot man on a penny-farthing bicycle rides along the banks of the Mississippi.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

A military museum and library dedicated to the citizen soldier.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Eight feet in diameter and more than 24 feet around.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.